Side Headrest with Chin Support and Clamp

ABSTRACT

Apparatus, devices, systems, and methods for clamping a length adjustable hook on a portable headrest with chin support to a top or side of a seat back, which is both adjustable and foldable to be portable for ease in transport. The horizontal chin rest pivotally attached to the bottom of a vertical member allows a sitting person&#39;s head to be supported in an upright position, while restricting movement both forward and side to side. The headrest can have telescoping vertical members which are length adjustable for different sized users. The chin support can have a cushion that is rotatable at different increments for comfort. The cushion can be slotted to allow the vertical member to be placed inside the slotted portion.

This application is a Divisional Application of U.S. patent applicationSer. No. 14/503,867 filed Oct. 1, 2014, now allowed, which is aContinuation-In-Part of U.S. patent application Ser. No. 14/154,290filed Jan. 14, 2014, now U.S. Pat. No. 9,079,520, which is incorporatedby reference in its' entirety.

FIELD OF INVENTION

This invention relates to attachable and detachable head supports, andin particular to apparatus, devices, systems, and methods for clamping aportable headrest with chin support on top a back of a seat, that isboth adjustable and foldable for portability.

BACKGROUND AND PRIOR ART

Passengers and travelers that travel over long distances with or withoutstop-over's typically have difficulty relaxing and falling asleep whilesitting in upright positions. Most seats on aircraft, busses, trains andthe like, have limited capability of allowing the seat to be fullyreclined to a horizontal position. Most seats cannot fully recline sincea reclined seat would hit against a passenger sitting behind. As such,the passenger/traveler has to try to relax and sleep in a generallyupright position.

A problem with sitting upright is that the head of the seatedpassenger/traveler will tend to fall sideways and foreword over time.Using one's hand to support one's head is difficult since there isnothing for the bent elbow to rest on, and is also uncomfortable.

Seat belt harnesses and cross-chest straps may keep thepassenger/traveler in a vertical position, but do not prevent their headfrom bending side to side or bending forward.

A popular type of travel aid is the ergonomic pillow generally formedfrom foam with a side cut-out so that the pillow can wrap about one'sneck. See for example, U.S. Des. D444,980 to Mowat et al. However, thesetypes of pillows are best used by persons in generally horizontalsleeping positions, which do not have the problem of thepassenger/traveler being in an upright sitting position where they cantend to fall forward. Additionally, these types of foam pillows can bequite bulky and are not easily collapsible.

Attempts have been made of the years to attach headrests on seats. Seefor example, U.S. Pat. No. 42,084 to Hambujer; U.S. Pat. No. 104,473 toLyon et al.; U.S. Pat. No. 162,784 to White; U.S. Pat. No. 221,752 toTaylor; U.S. Pat. No. 379,987 to Ryan; U.S. Pat. No. 426,069 to Rogers;U.S. Pat. No. 255,814 to Pulsifer; and U.S. Pat. No. 7,393,057 toFraser.

However, these headrest supports are generally limited to single pads,curved bars, which rest against the side or back of the head, and do notprevent the passenger/traveler from falling forward. Additionally, thesedevices are generally bulky, and do not fold up when not being used.

Thus, the need exists for solutions to the above problems with the priorart.

SUMMARY OF THE INVENTION

A primary objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, with a clamp portion beingadjustable for different size seat backs.

A secondary objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, having an adjustable chinsupport for supporting one's head at different heights depending on thesize of the seated passenger.

A third objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, having a height adjustable chinsupport for supporting a seated passenger's head at different heightsdepending on the size of the seated passenger.

A fourth objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, having a padded chin supportfor comfortably supporting the chin of the seated passenger.

A fifth objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, that is foldable for ease intransport, when not being used.

A sixth objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back having a vertical member that islength adjustable.

A seventh objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, having a clamp that is lengthadjustable.

An eighth objective of the present invention is to provide apparatus,devices, systems, and methods for clamping a portable headrest with chinsupport to a top or side of a seat back, with a cushion on the chinsupport that is rotatable in different increments.

Further objects and advantages of this invention will be apparent fromthe following detailed description of the presently preferredembodiments which are illustrated schematically in the accompanyingdrawings.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a rear top perspective view of the novel headrest in adeployed position.

FIG. 2 is a front bottom perspective view of the headrest of FIG. 1.

FIG. 3 is a rear bottom perspective view of the headrest of FIG. 1.

FIG. 4 is another view of the headrest of FIG. 3 folded for storage.

FIG. 5 is a rear view of the headrest of FIG. 1.

FIG. 6 is a left side view of the headrest of FIG. 1.

FIG. 7 is a front view of the headrest of FIG. 1.

FIG. 8 is a right side view of the headrest of FIG. 1.

FIG. 9 is a top view of the headrest of FIG. 1.

FIG. 10 is a bottom view of the headrest of FIG. 1.

FIG. 11 is a rear view of the folded headrest of FIG. 4.

FIG. 12 is a left side view of the folded headrest of FIG. 4.

FIG. 13 is a front view of the folded headrest of FIG. 4.

FIG. 14 is a right side view of the folded headrest of FIG. 4.

FIG. 15 is a top view of the folded headrest of FIG. 4.

FIG. 16 is a bottom view of the folded headrest of FIG. 4.

FIG. 17 is an exploded perspective view of the headrest of the precedingfigures.

FIG. 18 is an enlarged view of the hook base and hook slide of theheadrest of the preceding figures.

FIG. 19A is a cross-sectional view of the hook base and slide of theheadrest of FIG. 18 along arrows 19X showing the release button and lockscrew/bolt with the lock screw/bolt nested under spring pressure byspring into one of several detents in the base (a locked clampposition).

FIG. 19B is another cross-sectional view of the hook base and hook slideof FIG. 18 along arrows 19X with the release button being pressed andthe lock screw/bolt released from the detent in the base (an unlockedclamp position).

FIG. 20 is a partial cut-away detail of the clamp base of the headrestshowing the head of the lock screw/bolt nested in the first base detent.

FIG. 21 is another view of FIG. 20 showing the head of the lockscrew/bolt pushed out of the detent (the release button 40 on theopposite of the view is being pressed).

FIG. 22 is another view of FIG. 21 showing the hook slide adjusted andlock screw/bolt head nested in another detent.

FIG. 23 is a side view of the headrest of the preceding figures clampedto a seat back.

FIG. 24 is a perspective view of the headrest of the preceding figuresshowing chin rest being rotatable about the bottom tube for bestlocation.

FIG. 25 is a perspective view of the headrest of FIG. 24 showing thatthe top and bottom tubes telescoping with one another and locked to adifferent overall length with the spring pin.

FIG. 26 is a perspective view of the headrest of the preceding figuresshowing a person resting their chin on an installed and adjustedheadrest.

FIG. 27 is a top front perspective view of another version of theheadrest with telescoping tubes retracted and chin rest folded up.

FIG. 28 is another view of the headrest of FIG. 27 with the chin resthalf folded down showing motion arrows depicting the radial and linearadjustment possible in this configuration.

FIG. 29A is another view of the head rest of FIG. 27 with thetelescoping tubes fully extended and the chin rest fully deployed.

FIG. 29B is a view of the chin rest of FIG. 29A with an optional foampad for the chin rest.

FIG. 30 is a left side view of the headrest of FIG. 27.

FIG. 31 is a right side view of the headrest of FIG. 27.

FIG. 32 is a back view of the headrest of FIG. 27.

FIG. 33 is a front view of the headrest of FIG. 27.

FIG. 34 is a bottom view of the headrest of FIG. 27.

FIG. 35 is a top view of the headrest of FIG. 27.

FIG. 36 is a top front exploded perspective view of the head rest ofFIG. 27.

FIG. 37 is a side view of the headrest of FIG. 27 with the chin restfolded fully up and the bottom telescoping tube about half extended.

FIG. 38 is an enlarged cross-sectional view of the FIG. 27 tube lockassembly along arrows 38X.

FIG. 39 is an enlarged detailed view of the cam follower and tube camlock from FIG. 37.

FIG. 40 is another side view of the head rest of FIG. 37 with the chinrest starting to fold down (motion arrow).

FIG. 41 is an enlarged detailed section view of tube lock assembly 250of FIG. 40 along arrows 41X.

FIG. 42 is an enlarged detailed view of the cam mechanism from FIG. 40.

FIG. 43 is another side view of the head rest of FIG. 37 with the chinrest fully folded down.

FIG. 44 is an enlarged detailed cross-sectional view of the tube lockmechanism from FIG. 43. The expander flange can be seen fullycompressing the O-ring locking the tubes together.

FIG. 45 is an enlarged cross sectional view of the cam mechanism of FIG.43.

FIG. 46 is a top perspective view of another version of the headrestwith a sliding metal hook assembly that uses a cam lock lever to set thehook extension.

FIG. 47 is another view of the headrest of FIG. 46 showing the cam locklever oriented away from the upper tube indicating that the hook isunlocked.

FIG. 48 is a cross-sectional view of the hook section of the headrest ofFIG. 46 along arrows 48X.

FIG. 49 is another cross-sectional view of FIG. 47 along arrows 49Xshowing cam locking surface out of contact with the hook leg topunlocking the assembly.

FIG. 50 is an exploded view of the metal hook assembly of FIG. 46.

FIG. 51 is a front perspective view of another version of the headrestwith an adjustable, rotating chin rest.

FIG. 52 is a rear perspective view of headrest of FIG. 51.

FIG. 53 is a top perspective view of FIG. 51 showing the chin rest, withthe plastic hex core molded in, pulled off of the chin rest hex shaft.

FIG. 54 is a perspective view of the chin rest of FIG. 52 with the hexcore removed.

FIG. 55 is an enlarged view of the chin rest cavity (for the hex core),the hex core of FIG. 53, and the end of the chin rest hex shaft.

FIG. 56 is an end view of the headrest of the preceding Figures showingthe extent of the chin rest cushion adjustment.

FIG. 57 is a side view of the headrest of FIG. 56.

FIG. 58 is a cross sectional view of the chin rest of FIG. 57 alongarrows 58X showing the hex shape of the interlocking parts.

FIG. 59 is a top perspective view of the headrest of the precedingFigures with the adjustable chin rest. The chin rest is adjusted to itsmaximum height.

FIG. 60 is another top perspective view of the headrest of FIG. 59 withthe chin rest adjusted 45 degrees from its maximum height.

FIG. 61 is another top perspective view of the headrest of FIG. 59 withthe chin rest adjusted 90 degrees from its maximum height.

FIG. 62 is another top perspective view of the headrest of FIG. 59 withthe chin rest adjusted 135 degrees from its maximum height.

FIG. 63 is another top perspective view of the headrest of FIG. 59 withthe chin rest adjusted 180 degrees from its maximum height.

FIG. 64 is another top perspective view of the headrest of FIG. 63 withthe chin rest folded up.

FIG. 65 is a perspective view of the chin rest of the preceding Figureshooked over the side of a seat back with the user resting the side oftheir head against the cushion.

FIG. 66 is a rear perspective view of the chin rest with a slotted chinrest pad. Chin rest shown folded down.

FIG. 67 shows the chin rest pad folded up showing the top tube nestinginto the chin rest pad slot.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Before explaining the disclosed embodiments of the present invention indetail it is to be understood that the invention is not limited in itsapplications to the details of the particular arrangements shown sincethe invention is capable of other embodiments. Also, the terminologyused herein is for the purpose of description and not of limitation.

In the Summary above and in the Detailed Description of PreferredEmbodiments and in the accompanying drawings, reference is made toparticular features (including method steps) of the invention. It is tobe understood that the disclosure of the invention in this specificationincludes all possible combinations of such particular features. Forexample, where a particular feature is disclosed in the context of aparticular aspect or embodiment of the invention, that feature can alsobe used, to the extent possible, in combination with and/or in thecontext of other particular aspects and embodiments of the invention,and in the invention generally.

In this section, some embodiments of the invention will be describedmore fully with reference to the accompanying drawings, in whichpreferred embodiments of the invention are shown. This invention may,however, be embodied in many different forms and should not be construedas limited to the embodiments set forth herein. Rather, theseembodiments are provided so that this disclosure will be thorough andcomplete, and will convey the scope of the invention to those skilled inthe art. Like numbers refer to like elements throughout, and primenotation is used to indicate similar elements in alternativeembodiments.

A list of components will now be described.

-   10 Portable seat back headrest.-   20 Hook base.-   30 Hook slide.-   40 Hook release button.-   50 Hook lock screw/bolt with enlarged head.-   60 Lock screw slot in base.-   70 Lock detents in base.-   80 Release spring.-   90 Top tube.-   100 Holes in top tube for length adjustment.-   110 Spring pin in bottom tube for length adjustment.-   120 Bottom tube.-   130 Rotating chin rest hinge allows chin rest to rotate about bottom    tube.-   140 Chin rest hinge pin.-   150 Bottom tube cap.-   160 Chin rest.-   170 Chin rest foam cushion tube fits over chin rest.-   180 Seat back.-   190 Chin rest user.-   200 second headrest.-   210 second headrest top tube.-   220 second headrest bottom tube.-   240 second headrest optional chin rest cushion.-   250 Tube lock assembly.-   260 Tube lock adjustment nut.-   270 Tube lock adjustment washer.-   280 Tube lock O-ring expander flange.-   290 Tube lock fixed flange.-   300 Tube lock spring.-   310 Tube lock spring washer.-   320 Spring adjustment spacer.-   330 Tube lock O-ring (uncompressed).-   335 Tube lock O-ring (compressed).-   340 Tube lock shaft.-   350 Cam follower.-   360 Top tube bushing.-   370 Chin rest mounting flange.-   380 second headrest chin rest with integrated tube lock cam.-   390 Tube lock cam.-   400 Linear motion arrow of telescoping tube length.-   410 Radial motion arrow of chin rest rotation.-   420 Curve motion arrow of chin rest folding down.-   430 Linear motion of tube lock shaft pulling expander flange-   down as a result of tube lock cam rotation.-   440 Headrest with metal cam lock hook.-   450 hook.-   455. right opening-   460 hook leg.-   470 Cam lock bracket.-   480 Cam lock lever.-   485 Locking cam surface of cam lock lever.-   490 Cam lock pin.-   500 Cam stop bracket.-   510 Cam stop pin.-   520 Hook mount finial.-   530 Finial base.-   540 Finial mount screw.-   550 Adjustable, rotating chin rest.-   560 Chin rest cushion.-   565 Cavity in chin rest cushion contains chin rest hex core.-   570 Cushion hex core is molded or sewn into cushion.-   580 Folding chin rest with hex shaft.-   590 Chin rest hex shaft.-   600 pad-   610 slot

FIG. 1 is a rear top perspective view of the novel headrest 10 in adeployed position. FIG. 2 is a front bottom perspective view of theheadrest 10 of FIG. 1. FIG. 3 is a rear bottom perspective view of theheadrest 10 of FIG. 1.

FIG. 4 is another view of the headrest of FIG. 3 folded for storage.

FIG. 5 is a rear view of the headrest 10 of FIG. 1. FIG. 6 is a leftside view of the headrest 10 of FIG. 1. FIG. 7 is a front view of theheadrest 10 of FIG. 1. FIG. 8 is a right side view of the headrest 10 ofFIG. 1. FIG. 9 is a top view of the headrest 10 of FIG. 1. FIG. 10 is abottom view of the headrest 10 of FIG. 1.

Referring to FIGS. 1-3 and 5-10, the novel head rest 10 includes a hookbase 20 attached to the upper end of a top tube 90. A hook slide 30 withhook release button 40 can slide relative to a lock screw slot 60 inbase 20 having lock detents 70 in the base 20. The top tube 90 cantelescopingly slide about a bottom tube 120. An outwardly extendingspring biased pin 110 in bottom tube 120 can pop in and out of throughholes 100 in the top tube 90 that allow for different height adjustmentof the top tube 90 relative to bottom tube 120.

A rotating chin rest hinge 130 held in place by bottom tube cap 150allows for horizontally attached chin rest 160 to pivot horizontallyrelative to the lower end of the bottom tube 120. A chin rest hinge pin140 attached to the rest hinge 130 and the horizontal chin rest 160,allows for the chin rest 160 to pivot up relative to the pivot pin 140.A cushion sleeve 170 such as a foam sleeve can wrap about the chin rest160.

FIG. 11 is a rear view of the folded headrest 10 of FIG. 4. FIG. 12 is aleft side view of the folded headrest 10 of FIG. 4. FIG. 13 is a frontview of the folded headrest 10 of FIG. 4. FIG. 14 is a right side viewof the folded headrest 10 of FIG. 4. FIG. 15 is a top view of the foldedheadrest 10 of FIG. 4. FIG. 16 is a bottom view of the folded headrest10 of FIG. 4.

Referring to FIGS. 4 and 11-16, the novel headrest 10 can collapsed intoa folded position with the hook slide 30 slid inwardly along lock screwslot 60 of the hook base. The top tube 90 can be slid down over bottomtube 120 to be substantially concentric and overlying with one another.The chin rest 160 can be pivoted about chin rest hinge pin 140, andfolded upward by hinge pin 140, so that the chin rest 160 is parallel tooverlying tubes 90, 120, and hook base 20 is parallel to rest hinge 130.

The folded headrest 10 can be sized in order to fit in a user's pocket,a backpack, a briefcase, handbag, and the like. Additionally, theheadrest can be made from lightweight materials, and the like.

FIG. 17 is an exploded perspective view of the headrest 10 of thepreceding figures. The detail of the hook lock screw 50 with releasespring 80 which can overlay the threaded end of the screw 50 and a hookrelease button 40.

FIG. 18 is an enlarged view of the hook base 20 and hook slide 30 of theheadrest 10 of the preceding figures.

FIG. 19A is a cross-sectional view of the hook base 20 and slide 30 ofthe headrest 10 of FIG. 18 along arrows 19X showing the release button40 and lock screw/bolt 50 with the lock screw/bolt 50 nested underspring pressure by spring 80 into one of several detents 70 in the base20. In this view, the hook slide 30 (clamp) is locked in a fixedhorizontal position.

FIG. 19B is another cross-sectional view of the hook base 20 and hookslide 30 of FIG. 18 along arrows 19X with the release button 40 beingpressed and the lock screw/bolt 50 released from the detent 70 in thebase 20. In this view, the hook slide 30 (clamp) is unlocked and isadjustable for different thickness widths of the back of the seat.

FIG. 20 is a partial cut-away detail of the clamp base 20 of theheadrest showing the head of the lock screw/bolt 50 nested in the firstbase detent 70.

FIG. 21 is another view of FIG. 20 showing the head of the lockscrew/bolt 50 pushed out of the detent 70 (the release button 40 on theopposite of the view is being pressed). The hook slide 30 can then beadjusted slide relative to the hook base 20.

FIG. 22 is another view of FIG. 21 showing the hook slide 30 adjustedand the lock screw/bolt 50 head nested in an alternate detent 70.

FIG. 23 is a side view of the headrest 10 of the preceding figures withthe hook slide 30 having an outer hook end clamped to a rear surfaceedges of the seat back 160, with the top tube 90 on the front side ofseat back 160

FIG. 24 is a perspective view of the headrest 10 of the precedingfigures showing chin rest 160 with cushion sleeve 170 being rotatable ina horizontal direction about the bottom vertical tube 190 for bestlocation.

FIG. 25 is a perspective view of the headrest 10 of FIG. 24 showing thatthe top tube 90 and bottom tube 120 telescoping with one another andlocked to a different overall length by the outwardly spring biased pin110.

FIG. 26 is a perspective view of the headrest 10 of the precedingfigures showing a person 190 resting their chin on the chin rest 160with cushioned sleeve 170 of the installed and adjusted headrest 10.

The novel headrest 10 can be made from components, such as but notlimited to metal, such as aluminum, galvanized metal, and the like, orplastic, or combinations thereof.

Another alternative version of the headrest is to have the clamp member,vertical member, and chin rest, to be formed from a pliable material.For example, another headrest can have a possible Z shape formed from aone piece of pliable material, such as aluminum, with a cushionoverlayer. The pliable under support can be bent into shape, so that theclamp portion can bend about the top of a backrest, and the chin restbent into a desired configuration. The pliable material can have amemory when manipulated into a selected shape. Additionally, parts ofthe headrest can have pliable parts, such as the chin rest, and/or thevertical member and/or the clamp member.

Although the preferred embodiment shows the chin rest portion having acushion thereon, the novel headrest can also have a cushion about thevertical member. Additionally, the clamp member(s) can also have acushion.

The invention can have additional shapes as needed. For example, thevertical member can have a pad or blinder shape, having a cushionsurface with sufficient space for resting a user's face against. The padand/or blinder can also be bendable. For example, there can be anunderlying material, such as but not limited to aluminum, with a cushionface, with the underlying material having a memory when bent into aselected configuration.

The novel headrest 10 can be configured so that the vertical member ison the left side of the user's face or on the right side of their face.Additionally, two headrests 10 can be used so that the vertical membersare on both the left side and right side of the user's face. Stillanother version can be headrest having both a left vertical member and aright vertical member.

FIG. 27 is a top front perspective view of another version of theheadrest 200 with telescoping tubes 210, 220 retracted and chin restfolded up in the up direction of arrow 400. The top tube 210 and bottomtube 220 are not locked together in this configuration.

FIG. 28 is another view of the headrest 200 of FIG. 27 with the chinrest 380 half folded down showing motion arrows 410 depicting the radialand linear adjustment possible in this configuration. The telescopingtube length of tubes 210, 220 can be adjusted along with the rotation ofthe chin rest 380 relative to the hook base 20 and hook slide 30.

FIG. 29A is another view of the headrest 200 of FIG. 27 with thetelescoping tubes 210, 220 fully extended and the chin rest fullydeployed. The top and bottom tubes 210, 220 are locked together in thisconfiguration which will be shown and described later. Folding the chinrest 380 down fully locks the tubes 210, 220 together.

FIG. 29B is a view of the chin rest 380 of FIG. 29A with an optionalfoam pad 240 for the chin rest 380.

FIG. 30 is a left side view of the headrest 200 of FIG. 27. FIG. 31 is aright side view of version of the headrest 200 of FIG. 27. FIG. 32 is aback view of the headrest 200 of FIG. 30. FIG. 33 is a front view of theheadrest 200 of FIG. 27. FIG. 34 is a bottom view of the headrest 200 ofFIG. 27. FIG. 35 is a top view of the headrest 200 of FIG. 27.

FIG. 36 is a top front exploded perspective view of the headrest 200 ofFIG. 27. Here, the top tube 210, bottom tube 220, and tube lock shaft340 have been truncated to in order to show all of the components.

FIG. 37 is a side view of the headrest of FIG. 27 with the chin rest 380folded fully up and the bottom telescoping tube 220 about half extended.The top and bottom tubes 210, 220 are ghosted to view the tube lockassembly 250. A top tube bushing 360 is frictionally fit into the hollowbottom end of the upper tube 210 with the upper end of the lower tube220 fitting inside the top tube bushing 360. The chin rest mount flange370 is sectioned to view the tube cam lock 390.

FIG. 38 is an enlarged cross-sectional view of the FIG. 27 tube lockassembly 250 along arrows 38X. Space can be seen between the O-ring andthe inside wall of the top tube indicating that the tubes are not lockedtogether.

FIG. 39 is an enlarged detailed view of the cam follower 350 and tubecam lock 390 from FIG. 37.

Referring to FIGS. 36-39 uncompressed O-ring 330 is not jammed againstinner wall of upper tube 210 and the bottom edges of tube lock O-ring280 is raised out of the circumferential cavity in the upper surface oftube lock fixed flange 290. This allows for bottom tube 220 to move upand down relative to top tube 210 to adjust the overall telescopinglength of top tube 210 and bottom tube 220.

Once the user finds a selected length, the chin rest 380 is rotateddownward along arrow 420 (shown in FIG. 45).

FIG. 40 is another side view of the head rest 200 of FIG. 37 with thechin rest 380 starting to fold down along motion arrow 420. The camfollower 350 is riding on the tube lock cam 390 (part of the chin rest)which allows the attached shaft 340 to drop under pressure from thespring.300. As the shaft 340 drops in the direction of arrow 430, itpulls down the expander flange 280 which begins to expand the O-ring330. The tubes 210, 220 are not locked together in this configuration.The arrow 430 shows the linear motion of the tube lock shaft 340 pullingexpander flange 280 down as a result of the tube lock cam 390 rotationalong arrow 420. The expander flange 280 stretches the O-ring 330outward 330/335 and jam it between the inside wall of the top tube 210and the fixed flange 290. This locks the tubes 210, 220 together whenthe chin rest 380 is completely folded down.

As shown in FIG. 40, a tube lock adjustment nut 260 rotated aboutexterior threads of tube lock shaft 340 fixes the location of tube lockadjustment washer 270 and tube lock O-ring expander flange 280. Tubelock fixed flange 290 can have a lower end with shoulder portions thatrest on tube lock spring 300 which presses against tube lock springwasher 310 and spring adjustment washer 320

FIG. 41 is an enlarged detailed section view of tube lock assembly 250of FIG. 40 along arrows 41X. The expander flange 280 can be seendropping causing the O-ring 330/335 to expand outward toward the insidewall of the upper tube 210. No space can be seen between the O-ring330/335 and the inside wall of the upper tube 210.

FIG. 42 is an enlarged detailed view of the tube lock cam 390 and camfollower 350 from FIG. 40.

FIG. 43 is another side view of the headrest 200 of FIG. 37 with thechin rest 380 fully folded down along arrow 420. The cam follower 350has dropped to the cams low point on tube cam lock 390 allowing theexpander flange 280 to fully compress the O-ring 335 between the fixedflange 290 and the inner wall of the upper tube 210. The tubes 210, 220are locked together in this configuration.

FIG. 44 is an enlarged detailed cross-sectional view of the tube lockassembly 250 of FIG. 43 along arrows 44X. The expander flange 280 can beseen fully compressing the O-ring 335 locking the tubes 210, 220together. FIG. 45 is an enlarged cross sectional view of the tube camlock 390 and cam follower 350 of FIG. 43.

Referring to FIGS. 40-45 compressed O-ring 335 is shown as generallyjammed against inner wall of upper tube 210 and the bottom edges of tubelock O-ring 280 are generally fit into the circumferential cavity in theupper surface of tube lock fixed flange 290. This allows for bottom tube220 to be in a locked position relative to top tube 210. In the lockedposition, the user can rest their chin on the folded down chin rest 380.Once the user is finished the chin rest 380 can be rotated upward in anopposite direction to arrow 420, which allows the bottom tube 220 tomove telescoping downward relative to the top tube 210.

FIG. 46 is a top perspective view of another version of the headrest 440with a sliding metal hook assembly that uses a cam lock lever 480 to setthe hook extension position of the hook end (metal hook) 450. This viewshows the cam lock lever 480 oriented toward the upper tube 210indicating that the hook 450 is locked in a length position.

FIG. 47 is another view of the headrest 440 of FIG. 46 showing the camlock lever 480 oriented away from the upper tube 210 indicating that thehook 480 is unlocked.

FIG. 48 is a cross-sectional view of the hook section of the headrest ofFIG. 46 along arrows 48X. The cam locking surface 485 puts pressure onthe top of the hook leg 460 locking the hook leg 460 and the metal hookend 450 together and setting the hook extension 450 at a fixedextension.

FIG. 49 is another cross-sectional view of FIG. 47 along arrows 49Xshowing the cam locking surface 485 out of contact with the top of thehook leg 460 unlocking the assembly. FIG. 50 is an exploded view of themetal hook assembly components of FIG. 46.

Referring to FIGS. 46-50, a final base 530 frictionally fit into thehollow upper end of top tube 210 can have a mount screw 540 screwed intoan opening in the right end of hook leg 460 an into the threaded openingin the bottom of hook mount finial 520. A cam stop bracket 500 can begenerally fixed to a left end of the hook leg 460 by a cam stop pin 510.A cam lock bracket 470 can be generally fixed to the right end of benthook end 450 by raised dimple (in the bottom of cam lock bracket thatfits into the right hole 455 of the bent hook end 450. A rotatable camlock lever is pivotally attached to opening(s) in the raised sideflanges of the cam lock bracket 470 by a cam lock pin 490.

FIG. 51 is a front perspective view of another version of the headrest440 with an adjustable, rotating chin rest 550.

FIG. 52 is a rear perspective view of headrest 440 of FIG. 51.

FIG. 53 is a top perspective view of FIG. 51 showing the chin rest 550,with the plastic hex core 570 molded in, pulled off of the chin rest hexshaft 590. The hex core 570 and the chin rest hex shaft 590 can have anoctagonal shape that locks them together radially but allows for them tobe oriented in 45 degree increments to each other. This enables the chinrest cushion 560 to be raised or lowered to meet the needs of taller orshorter users.

FIG. 54 is a perspective view of the chin rest 550 of FIG. 52 with thehex core 570 removed.

FIG. 55 is an enlarged view of the chin rest cavity 565 for the hex core570 of FIG. 53, and the end of the chin rest hex shaft 590.

FIG. 56 is an end view of the headrest 550 of the preceding Figuresshowing the extent of the chin rest cushion 560 adjustment.

FIG. 57 is a side view of the headrest 550 of FIG. 56.

FIG. 58 is a cross sectional view of the chin rest of FIG. 57 alongarrows 58X showing the hex shape of the interlocking parts.

Referring to FIGS. 51-58, the chin rest 550 can pivot from a foldedposition adjacent tubes 210, 220 to a perpendicular extended position byrotating relative to chin rest hinge pin 140. The chin rest 550 canrotate in 45 degree increments about chin rest hex shaft 590. The hexcore 570 inside the cushion 560 fits over hex shaft 590 and indexesradially 580 to facilitate adjustment of the cushion 560 inapproximately 45 degree increments.

FIG. 59 is a top perspective view of the headrest 440 of the precedingFigures with the adjustable chin rest 550. The chin rest 550 is adjustedto its maximum height.

FIG. 60 is another top perspective view of the headrest 440 of FIG. 59with the chin rest 550 adjusted 45 degrees from its maximum height.

FIG. 61 is another top perspective view of the headrest 440 of FIG. 59with the chin rest 550 adjusted 90 degrees from its maximum height.

FIG. 62 is another top perspective view of the headrest 440 of FIG. 59with the chin rest 550 adjusted 135 degrees from its maximum height.

FIG. 63 is another top perspective view of the headrest 440 of FIG. 59with the chin rest 550 adjusted 180 degrees from its maximum height.This is the chin rests minimum height. Rotational adjustment can be upto approximately 225 degrees, approximately 270 degrees, andapproximately 315 degrees.

FIG. 64 is another top perspective view of the headrest 440 of FIG. 63with the chin rest 550 folded up against tube 210.

FIG. 65 is a perspective view of the chin rest 440 of the precedingFigures hooked over the side of a seat back 180 with the user 190resting the side of their head against the chin rest cushion 560. FIG.66 shows an alternate use to the original configuration of hooking thechin rest 440 over the top of the seat back 180 and resting your chin onthe rest as shown in previous Figures.

FIG. 66 is a rear perspective view of the headrest 440 with a chin restpad 600 and slotted portion 610, with the chin rest 600 shown foldeddown.

FIG. 67 shows the chin rest pad 600 folded up with the top tube 210nesting into the chin rest pad slot 610.

With the pad slot 610, the top tube 210 can rest inside the pad 600reducing the space needed for storage of the headrest 440. Also, in theconfiguration shown in FIG. 67, the headrest 440, the hook 450 with hookleg 460 can be wrapped over the top of a seat back so that the user canalso rest their head against the rear surface of the chin rest pad 600.

While some embodiments show cushions on the chin rests, the inventioncan be alternatively used with cushions wrapped about the verticalmembers, or having separate cushions about the chin rest and about thevertical members.

The invention can be used with a pillow also positioned on the chin restthat has no cushion or includes a cushion.

While a preferred embodiment of the invention uses the novel headrest onairplane passenger seats, the novel headrests can be used on other typesof seats, such as but not limited to bus passenger seats, trainpassenger seats, automobile seats, truck seats, van seats, and the like.

Although some components have been described as being made of metal, thecomponents can be made of different types of materials, such as but notlimited to plastic, or vice versa, combinations of metal and plastic,and the like.

While the invention has been described, disclosed, illustrated and shownin various terms of certain embodiments or modifications which it haspresumed in practice, the scope of the invention is not intended to be,nor should it be deemed to be, limited thereby and such othermodifications or embodiments as may be suggested by the teachings hereinare particularly reserved especially as they fall within the breadth andscope of the claims here appended.

I claim:
 1. A headrest comprising: a clamp for attaching the headrest toa top or side of a seat back; a vertical member having an upper endattached to the clamp and a lower end; and an elongated chin supportattached to the lower end of the vertical member, and adaptable to bepositioned under the chin of a person seated in the seat, the elongatedchin support having a first end and a second end with a generallyuniform diameter therebetween, the first end of the elongated chinsupport having a pivot point attached to the lower end of the verticalmember.
 2. The headrest of claim 1, wherein the vertical member has anadjustable length by a first vertical member telescoping with a secondvertical member to different lengths.
 3. The headrest of claim 2,wherein the first vertical member and the second vertical member includetubular members.
 4. The headrest of claim 2, wherein the telescopinglyadjustable length is adjustable to different lengths when the chinsupport is a raised folded position parallel to and adjacent to thefirst and the second vertical member.
 5. The headrest of claim 4,wherein the telescopingly adjustable length is fixed to a selectedlength when the chin support is folded down to a generally perpendiculardirection to the first and the second vertical member.
 6. The headrestof claim 1, wherein the clamp includes an L shaped hook end slidinglyadjustable to one end of an elongated member, which has a second endattached to an upper portion of the vertical member.
 7. The headrest ofclaim 6, further comprising: a cam lock lever having a first positionfor locking the L shaped hook end to the one end of the elongatedmember, and a locking pin having a second position for adjusting alength of the L shaped hook end relative to the elongated member.
 8. Theheadrest of claim 1, further comprising: a cushion sleeve on the chinsupport.
 9. The headrest of claim 8, wherein the chin support includes:a hex shaped shaft, with a cushion hex core fit about the hex shapedshaft, which together fit into a core opening in one end of the cushionsleeve, wherein the cushion sleeve is rotatable to different positionsrelative to the chin support by radially indexing the cushion sleeve onthe hex core relative to the hex shaped shaft.
 10. The headrest of claim8, further comprising: a pivot portion between the lower end of thevertical member and the chin support; and an elongated slot along anupper surface of the cushion sleeve, wherein folding the chin supportupward allows for a side of the vertical member to fit within theelongated slot on the cushion sleeve.
 11. A headrest comprising: a clampfor attaching the headrest to a top or side of a seat back; a memberhaving an upper end attached to the clamp and a lower end; a chinsupport attached to the lower end of the member, and adaptable to bepositioned under the chin of a person seated in the seat; and a cushionsleeve on the chin support, wherein the chin support includes a hexshaped shaft, with a cushion hex core fit about the hex shaped shaft,which together fit into a core opening in one end of the cushion sleeve,wherein the cushion sleeve is rotatable to different positions relativeto the chin support by radially indexing the cushion sleeve on the hexcore relative to the hex shaped shaft.
 12. The headrest of claim 11,wherein the clamp includes an L shaped hook end slidingly adjustable toone end of an elongated member, which has a second end attached to anupper portion of the member that is located between the clamp and thechin support.
 13. The headrest of claim 12, further comprising: a camlock lever having a first position for locking the L shaped hook end tothe one end of the elongated member, and a locking pin having a secondposition for adjusting a length of the L shaped hook end relative to theelongated member.
 14. A headrest comprising: a clamp for attaching theheadrest to a top or side of a seat back; a member having an upper endattached to the clamp and a lower end; a chin support attached to thelower end of the member, and adaptable to be positioned under the chinof a person seated in the seat; a cushion sleeve on the chin support; apivot portion between the lower end of the member and the chin support;and an elongated slot along an upper surface of the cushion sleeve,wherein folding the chin support upward allows for a side of the memberto fit within the elongated slot on the cushion sleeve.
 15. The headrestof claim 14, wherein the clamp includes an L shaped hook end slidinglyadjustable to one end of an elongated member, which has a second endattached to an upper portion of the member that is located between theclamp and the chin support.
 16. The headrest of claim 15, furthercomprising: a cam lock lever having a first position for locking the Lshaped hook end to the one end of the elongated member, and a lockingpin having a second position for adjusting a length of the L shaped hookend relative to the elongated member.